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KRUPS XP-7240 coffee machine not coming out coffee water

Hello,
I have a problem with my coffee machine Krups XP-7240. It was not used for 3-4 months due to leakage below. Now I opened it, cleaned it properly, vacuumed well, changed the piston with a new one. After that I opened and cleaned the drain valve. But when starting the machine it proceeds with grinding but no water comes to cylinder. Only from steam nozzle comes hot pressurized steam (hot water) when pressing button for steam. But nothing comes from the place that coffee should come out. In fact seems that no water goes to the cylinder.
I haven't opened yet the pump to clean it. What could be the problem? 
Thanks in advance. Regards: Martin  

Comments
Shizo
Shizo picture
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Hi
Problem is pump,  pour vinegar instead of water.

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